1. Adu Ampomah Y, Novak FJ, Afza R, Vanduren M, Peres Dallos M (1988) Initiation and growth of somatic embryos of cacao (Theobroma cacao), Café Cacao Thé 32: 187–200.
2. Ahée J, Arthuis P, Duval Y, Guenin G, Hanower J, Hanower P, Lievoux, D, Lioret C, Malaurie B, Pannetier C, Raillot D, Varechon C, Zuckerman L (1981) La multiplication végétative du palmier à huile par embryogenèse somatique, Oléagineux 36: 113–118.
3. Altman DW, Fryxell PA, Koch SD, Howell CR (1990) Gossypium germplasm conservation augmented by tissue culture techniques for field collecting, Economic Bot 44: in press.
4. Ascanio ECB, Arcia MMA (1987) Haploids from anther culture in C of fea arabica L. In: Angarita Zerba A (Ed) International Congress of Plant Tissue Culture for Tropical Species (pp 68–69), Bogota (Columbia).
5. Auboiron E, Carron VIP, Michaux-Eerrière N (1990) Influence of atmospheric gases, particularly ethylene on somatic embryogenesis of Hevea brasiliensis, Plant Cell Tissue Organ Culture (in press).